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Subsections



14.8 Correction for Signal Non-Linearity


Description Parameter:	 None
Processing Level:	 SPD
Usage in processing:	 Section 7.3.3
File Type:		 Binary FITS Table
Units:		 	 [V/s]
File Names:		 PP1SLINR, PP2SLINR, PP3SLINR,
			 PC1SLINR, PC2SLINR

The correction tables for signal linearisation are in essence look-up tables providing for a given input signal a corrected output signal. Because the linearisation tables were obtained from a limited range of (calibrated) signals, the upper and lower validity boundaries are listed in the header of the Cal-G file.


14.8.1 Product PP1SLINR: signal linearisation for PHT-P1

Binary FITS table with record length 16. The record fields are:


Field	 Offset	Number Type Description
PP1SLFIL 0	1      I*4  Filter (CHW position)
PP1SLSIG 4	1      R*4  Uncorrected input signal (plateau average in [V/s])
PP1SLSCR 8	1      R*4  Corrected signal [V/s]
PP1SLSCU 12	1      R*4  Uncertainty of the corrected signal [V/s]

The header keywords defining the calibrated signal range


Field	Type	Description
FILTCWd	I	CHW3 filter position, d=(1,n), n=number of filters
LOSIGLd	R	lower validity limit of signal non-linearity correction [V/s]
HISIGLd	R	upper validity limit of signal non-linearity correction [V/s]


14.8.2 Product PP2SLINR: signal PHT-P2 linearisation

Same as PP1SLINR, see Section 14.8.1, all field keywords start with `PP2'.


14.8.3 Product PP3SLINR: signal linearisation for PHT-P3

Same as PP1SLINR, see Section 14.8.1, all field keywords start with `PP3'.


14.8.4 Product PC1SLINR: signal linearisation for PHT-C100

Binary FITS table with record length 20. The record fields are:


Field	 Offset	Number	Type	Description
PC1SLFIL 0	1	I*4	Filter (CHW position)
PC1SLPIX 4	1	I*4	pixel number
PC1SLSIG 8	1	R*4	Uncorrected input signal (plateau average in [V/s])
PC1SLSCR 12	1	R*4	Corrected signal [V/s]
PC1SLSCU 16	1	R*4	Uncertainty of the corrected signal [V/s]

The header keywords defining the calibrated signal range


Field	Type	Description
FILTCWd	I	CHW2 filter position, d=(1,n), n=number of filters
LOSIGLd	R	lower validity limit of signal non-linearity correction [V/s]
HISIGLd	R	upper validity limit of signal non-linearity correction [V/s]


14.8.5 Product PC2SLINR: signal linearisation for PHT-C200

Same as PC1SLINR, see Section 14.8.4, all field keywords start with `PC2'.


next up previous contents index
Next: 14.9 PHT-S Dynamic Calibration Up: 14. Calibration-G Products Previous: 14.7 Detector Dark Signals
ISO Handbook Volume IV (PHT), Version 2.0.1, SAI/1999-069/Dc